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'(No Model.) I 3 Sheets-Sheet' GL DAVIDSON.

STOP MOTION MEGHANISM FOR CIRCULAR KNITTING MACHINES.

No.l 355,595. Patented Jann 4, 1887.

Mdm Wie/775mg (No Model.) Y l 3 Sh'eets-Sheet 2..

G. DAVIDSON.

STOP MOTION MECHANISM FCR CIRCULAR KNITTIG MACHINES.

(No Model.)

` `3 Sheets-Sheet 3. l G.' DAJIIDSON. STOP MOTION MECHANISM FOR OIROULAR KNITTING MACHINES. No. 355,596. Patented Jan. 4, 1887.

I 4wlmi-:seas: MMM? INVENTUH TM/(7 h 46a/pam. BY

ATTORNEY UNITED STATES PATENT OFFICE.

GEORGE DAVIDSON, OF PARIS, ONTARIO, CANADA.

STOP-MoTmN MECHAMSM FoR'olRcULAR-KMTTING MACHINES.

SPECIFICATION forming part of Letters Patent No. 355,595, dated January 4, 1887.

Application {iled July Q9, 1884. Serial No. 139,061. (No model.) I

To all whom may concern.:

Be it known that I, GEORGE DAvIDsoN, of Paris, Province of Ontario, Dominion of Canada, have invented a new and useful Improvement in Stop-Motion Mechanism forCircular- Knitting Machines, of which the following is a specification.

My invention relates to apparatus for operating the usual and ordinary stopmotion mechanism of circular -knitting machines. This apparatus, to which my invention as an improvement relates, consists of a pivoted lever that is drawn out by its handle against the force of a spring to put on the driving-belt of the machine from which power is derived, and which lever engages with a pivoted latch that is held down to its engagement by a latchpin on a tripping-rod to keep the driving-belt on and the lever drawn out, the said trippingrod being arranged between the vertical sides of an inverted-U-shaped standard, with bearings in the top of the latter, and at the bottom of said standard, so that the said tripping-rod can be turned therein to release the latch-pin and latch, and thus trip-the lever and throw off the driving-belt of the machine, to stop the rotation of the latter.

To provide improved means for automatically operating'the hereinbefore-describcd shifting mechanism when a yarn is broken or the bobbin has been run off is the object of my invention.

My invention, therefore, consists in the novel construction of the parts'an'd their combination, as will be hereinafter fully disclosed, and specifically, as is pointed out in the claims made hereto.

Accompanying this specification, to forma part of it, there are three plates of drawings containing six iignres, illustrating my invention, with the same designation of its parts by letter-reference used in all of them. Of these illustrations,Figure l shows'a side elevation of a part of a rotary knitting-machine with the ordinarystop-motionA connected therewith, and showing also my invention applied thereto to operate saidstop-motion. Fig. 2

illustrates aplan view of a part of the machinetable and the bed of the machine partly in section, and showing also the pivoted belt shifting or shipping lever with the adjust-able bracket afiixed thereto, the latch-pin, thelatch,

the tripping-rod, and the spring connected to the lever. K Fig.Y 3 shows, as detached from the machine, a view of a pivoted lever that is operated to trip the belt by turning the trippingrod. Fig. 4 shows, as detached from the ma-l chine, a view of a pivoted drop-catch, a series of which are arranged on the side of the knitting-machine cylinder, that shown in this representation being illustrated in larger proportion than those upon the cylinder, to better show its details. Fig. 5 is a perspective of a pivoted yarn-holder constructed with an angular end and an offset-arm. This figure illustrates also the plate by which the said yarnholder is connected to a supporting-standard and made adjustable thereon. Fig. 6 is an enlarged detail view in perspective, showing the yarn-guides, the bracket carrying the yarnholder,` and a part of a cylinder with a pivoted catch thereon.

The several parts of the knitting-machine, its stop-motion mechanism, and the apparatus containing my invention for operating the same are designated by letter-reference, and their function is described as follows:

The letter C designates the machine-cylinder, N the needles, W the web, and T the machine-table.

The stop-motion is designated as follows,`

ping-rod adapted' to turn in the top and bottom of said standard, and I a horizontallyprojected latch-pin on said tripping-rod.l

The letter L designates the latch of the stopmotion mechanism, said latch being pivoted at o in the brackets b b, attached to the standard U.

The letter I indicates a belt shipping lever, which is pivoted at'M,and S indicates a spring, which at its inner end is connected t'o a ring through which the machine-shaft passes, and at the other end tov the said leverfI, so that said lever is drawn out by its handle H to put on the belt against the force of said spring.

The letter 0 designates an adjustable bracket on the said lever, the inner end of which presses against the latch L when the inner end of the latter is beneath and held down by the latchpiu P. Thus when the lever is drawn out to ICC put on the belt it is held so as to keep the belt on and the machine running by the engagement of the bracket O on the said lever with the latch L, and the engagement of the latter with the lateh-pin P on the tripping-rod R. Now, when the rod R is turned by any means, its lateh-pin l? runs from oi' the end of the pivoted latch L, the latter turningI upwardly on its outer end by the pressure of the springlever, and the latter Aslips from off the latch, the lever being drawn inwardly by the spring to unship the belt.

To automatically operate the tripping-rod to throw oli` the belt and stop the machine when a thread of yarn is broken or fails in continuity to feed the machine, I employ the following mechanism.

The letter J designates a series of catches that are arranged on the exterior of the knitting-machine cylinder, each of which is pivoted at t, so that they can be turned down on their pivotal connection, and the letter z" indicates an incline projected upwardly from the machine-table, which engages with the under side of said catches to turn them up, so as to bring their lower surface parallel with the bottom edge of the knitting-machine cylinder after having been turned down.

The letter' d designates a lateral projection made on thev outer face of each ofthe catches.

The letter A indicates a standard, upon which, by means of a bracket,B, there is attached an upright plate, m, having adj ustably pivoted thereto a yarn-holder, h. This yarnholder is provided with a projecting arm, a, and is pivoted at 'its upper end in the holderplate m at 2, and at its lower end is formed with au angular termination, p, `the purpose of the termination being to keepthe holder rest-ing on the yarn as the same is passing into the machine between the yarn-guides n n. When the angular termination p2 is on the yarn, the holder is held up, and when the yarn breaks or fails to hold up the yarn-holder the yarn-holder falls to a vertical position, the upper part resting in the recess l of the projection p on the holder-plate igt, the projecting arm a2 pointing inward toward the cylinder C. When the yarn-holder his thus down, its arm a, as the machine revolves, comes in contact with the next one of the catches J to engage with its top rounded surface, k, so as to force downwardly the catch, as shown at J of Fig. 1.

The letter E designates a curved lever formed with theturned-up ends c and e2, and pivoted to the standardG at g, so as to be horizontally moved outwardly and inwardly at its ends.

The letter K designates a projecting arm on the tripping-rod R ofthe beltshipping mechanism.

The operation of the mechanism thus constructed to operate the tripping-rod is as follows: When the yarn Y is regularly passing into the machine, the angular end of the, holder h rests on the yarn at a point between the two yarn-guides n fn, and when the yarn breaks or wardly, and the opposite upturned end, e, to I engage with the arm K of the tripping-rod R,

so as to force the latter around on its pivotal connection, releasing the latch-pin, latch, and

belt-shipping niechanism'to stop the machine.

Where yarn breaks or fails to be supplied to the machine in continuity, blemishes and irregularities occur in the web, and to avoid these contingencies by the automatic operation of the machine is what my invention is designed to effect.

I am aware that a mechanism has been used which consists of yarn-holders hinged to a frame, and which holders, when released bya break in the yarn, fall down upon one side of a pivoted balance, to raise the other side of the latter and engage with one of the nuts on the machine-cylinder, so as to turn said frame and balance horizontally, which, being connected with an armV on the tripping-rod, are thus caused to trip the belt-shipping mechanism and stop the machine.

Having thus described :ny-invention, what I claim, and desire. to secure by Letters Patent, is-

1. The combination, withthe beltshipping mechanism and the cylinder of a rotary knitting-machine, of a yarn-holder pivotally supported and formed with an angular termination at its free end and an intermediate laterally-projecting arm, catches pivoted to the outer face of the cylinder, and a trip-lever having upturned ends to engage with the said catches, substantially as described.

2. The combination, with the belt-shipping mechanism and the cylinder of a rotary knitting-machine, of a yarn-holder pivotally supported and formed with an angular termination at its free end and an intermediate laterally-projected arm, catches pivoted to the outer face ofthe cylinder and having camsurfaces 7c and projecting pieces d, and the lever E, substantially as described.

3. The combination, with the cylinder of the machine and the table thereof, ofv the catches J, pivotally attached to the cylinder, and the incline v7, fixed on the table, substantially as described, and for the purpose stated.

Signed at Paris, Province of Ontario, Dominion of Canada, this 27th day of May, 1884, and in the presence` of the two witnesses whose names are hereto written.

GEORGE DAVIDSON.

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